The answer is Hydrogen Sulfite, because there is only one
Hydrogen and its attached to the Sulfite ion.
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lead II sulfite is PbSO3 lead IV sulfite is Pb(SO3)2
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No, sodium sulfite is not an acid. It is a salt composed of sodium cations and sulfite anions. Sodium sulfite is a reducing agent commonly used in various industrial applications.
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Ferrous sulfite is a compound.
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The IUPAC name for sodium sulfite is sodium hydrogen sulfite, or sodium bisulfite.